Salt water activated emergency lighting device

Abstract

A salt water activated emergency lighting device has a body, an anode electrode, a cathode electrode, a water supply module, a draining module and a light board. The body has a first compartment and a second compartment with a through hole therebetween. The anode electrode is mounted in the second compartment. The cathode electrode is mounted through a periphery of the second compartment. When the mains power is down, the water supply module unblocks the through hole, and salt water in the first compartment enters the second compartment. Salt water further reacts with the anode electrode and the cathode electrode in generation of power supplied to the light board for emergency lighting. When the mains power comes back, the through hole is blocked, and the draining module pumps the salt water in the second compartment back to the first compartment. Such cycling fulfills environmental protection without consuming electrode plates unnecessarily.

1 . A salt water activated emergency lighting device, comprising:
 a body having:
 a first compartment being hollow for storing salt water; 
 a second compartment being hollow and located underneath the first compartment; 
 a through hole formed through a bottom wall of the first compartment; 
 a salt water filling hole formed through a top wall of the first compartment; 
 a pumped water inlet formed through a sidewall of the first compartment; and 
 at least one opening formed through a periphery of the second compartment; 
   an anode electrode plate mounted in the second compartment;   at least one cathode electrode plate respectively mounted in and sealing the at least one opening of the second compartment;   a water supply module having:
 a position control member; and 
 a water stopper mounted in the second compartment, and connected with the position control member through a string and controlled by the position control member to selectively block the through hole; 
   a draining module having:
 a water pump mounted under a bottom of the second compartment; 
 a water hose, wherein one end of the water hose is connected with the water pump, and the other end of the water hose is connected to the pumped water inlet on the first compartment; 
 a water level sensor mounted under the bottom of the second compartment; and 
 a control board mounted on the bottom of the second compartment, and electrically connected with the cathode electrode plate, the anode electrode plate, the water level sensor and the water pump; and 
   a light board electrically connected with the control board of the draining module and having multiple light-emitting diodes.   
     
     
         2 . The salt water activated emergency lighting device as claimed in  claim 1 , wherein
 the body has two openings formed through each of a front wall and a rear wall of the second compartment; and   the salt water activated emergency lighting device has four cathode electrode plates mounted in and sealing the openings of the second compartment.   
     
     
         3 . The salt water activated emergency lighting device as claimed in  claim 2 , wherein
 the body further has a water level control compartment formed on the bottom of the second compartment and communicating with the second compartment; and   the water pump and the water level sensor are mounted through a sidewall of the water level control compartment, and the water level sensor has two sensor terminals.   
     
     
         4 . The salt water activated emergency lighting device as claimed in  claim 3 , further comprising:
 a salt water filling tube formed through the top wall of the first chamber and aligning with the salt water filling hole;   an enclosure mounted outside the body;   an amplifier having a power socket mounted through the enclosure; and   a light-emitting diode lens mounted on the enclosure and aligning with the light board;   wherein the light board is mounted through the enclosure.   
     
     
         5 . The salt water activated emergency lighting device as claimed in  claim 4 , wherein the body further has a hanger mounted on a top of the body, and the string is connected to the water position control member after penetrating through the first compartment and is wound around the hanger. 
     
     
         6 . The salt water activated emergency lighting device as claimed in  claim 5 , wherein the position control member is a solenoid valve, is mounted on the top of the body, and has a shaft slidably mounted therethrough and connected with one end of the string penetrating through the first compartment.